.GRO File Extension

2 file types use the .gro file extension.

Graphic Object Bitmap

Developer Hewlett-Packard
3.3  |  7 Votes

What is a GRO file?

Bitmap image format sometimes referred to as a GROB (GRaphic Object Bitmap); used by Hewlett-Packard scientific calculators, such as the HP-48 and HP-49; used for storing graphs, charts, and other graphics created on the calculator.

More Information

GRO files may be viewed on a computer using a supporting HP calculator emulator, such as Emu48.

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Programs that open GRO files


Allegro MIDI File

Developer N/A
3.0  |  2 Votes

ASCII text file that defines audio in a MIDI representation; also contains "note tracks," which specify display data for the audio; can be imported (and subsequently converted to other audio formats) using Audacity's File → Import MIDI... option.

Programs that open GRO files


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